The useful idea
Agree what the assistant may suggest, what it may do and what requires a person.
Choose a bounded job
A draft summary, a suggested related issue or an answer with sources can be easier to evaluate than a vague promise to automate a department.
Design for uncertainty
The workflow should show missing information and uncertain matches. Someone must own corrections, permissions and the decision to act.
Evaluate the awkward examples
Test common cases and the difficult ones. Review accuracy, missed exceptions, operating cost and the time a person spends checking results.